<template>
<div>
  <!--  面包屑导航区-->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/goods/add' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item><a href="/">商品管理</a></el-breadcrumb-item>
    <el-breadcrumb-item>添加商品</el-breadcrumb-item>

  </el-breadcrumb>
<!--  卡片视图-->
  <el-card>
    <!--  警告区域-->
    <el-alert
        title="添加商品信息"
        type="info" center show-icon :closable="false">
    </el-alert>
<!--    步骤条区域和tab标签页要一一对应，:active="activeIndex" 与<el-tabs>的 v-model可以绑定为一个。 name就等于对应的索引 -->
<!--    如果想把一个长的像数字的字符串转为数字，-0 就可以-->
    <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
      <el-step title="基本信息" ></el-step>
      <el-step title="商品参数"></el-step>
      <el-step title="商品属性"></el-step>
      <el-step title="商品图片"></el-step>
      <el-step title="商品内容"></el-step>
      <el-step title="完成"></el-step>
    </el-steps>
<!--    tab标签页-->
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top"  >
    <el-tabs v-model="activeIndex" :tab-position="'left'"  :before-leave="beforeTabLeave" @tab-click="tabClicked" >
      <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="addForm.goods_name"></el-input>
        </el-form-item>

          <el-form-item label="商品价格" prop="goods_price" >
            <el-input v-model="addForm.goods_price" type="number"></el-input>
          </el-form-item>

          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
          </el-form-item>

          <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
          </el-form-item>

          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="{
                  expandTrigger: 'hover',
                  ...cateProps,
                 }"
                @change="handleChange"></el-cascader>
          </el-form-item>
      </el-tab-pane>

      <el-tab-pane label="商品参数" name="1">
<!--        渲染表单的item项-->
        <el-form-item :label="item.attr_name" v-for="item in  manyTableData" :key="item.attr_id">
<!--  复选框组-->
          <el-checkbox-group v-model="item.attr_vals">
            <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals " :key="i" border>


            </el-checkbox>
          </el-checkbox-group>
        </el-form-item>
      </el-tab-pane>
      <el-tab-pane label="商品属性" name="2">
        <el-form-item :label="item.attr_name" v-for="item in  onlyTableData " :key="item.attr_id">
          <el-input  v-model="item.attr_vals"></el-input>
        </el-form-item>
      </el-tab-pane>
      <el-tab-pane label="商品图片" name="3">
    <!--  action表示图片要上传的后台API地址   list-type是通过指定补同的值,展示不同UI效果    -->
        <el-upload
            :action="uploadURL"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture" :headers="headersObj"
             :on-success="handleSuccess"

        >
          <el-button size="small" type="primary">点击上传</el-button>

        </el-upload>

      </el-tab-pane>
      <el-tab-pane label="商品内容" name="4">
<!--        富文本编辑器组件-->
        <quill-editor  v-model="addForm.goods_introduce">

        </quill-editor>
<!--        添加商品的按钮-->
        <el-button type="primary" class="btnadd" @click="add">添加商品</el-button>

      </el-tab-pane>
    </el-tabs>



      </el-form>
  </el-card>
<!--  图片预览-->
  <el-dialog
      title="图片预览"
      :visible.sync="dialogVisible"
      width="60%"
      >
    <img :src="pagePath" alt="" class="pageImg">
    <span slot="footer" class="dialog-footer">
  </span>
  </el-dialog>
</div>
</template>

<script>
import _ from 'lodash'
export default {
  data(){
    return {
      activeIndex:'0',
      //添加商品的表单数据对象
      addForm:{
        goods_name:'',
        goods_price:0,
        goods_weight:0,
        goods_number:0,
        //最下面的那个，表示商品所选中的分类数组
        goods_cat:'',
        //上传图片的数组
        pics:[],
        //富文本编辑器要用的商品描述
        goods_introduce:'',
        attrs:[],

      },
      //商品分类列表
      cateList:[],
      //
      cateProps:{
        value:'cat_id',
        label:'cat_name',
        children:'children'
      },
      //添加表单的验证规则
      addFormRules:{
        goods_name:[{required: true, message: '请输入！', trigger: 'blur'}],
        goods_price:[{required: true, message: '请输入！', trigger: 'blur'}],
        goods_weight:[{required: true, message: '请输入！', trigger: 'blur'}],
        goods_number:[{required: true, message: '请输入！', trigger: 'blur'}],
        goods_cat:[{required: true, message: '请输入！', trigger: 'blur'}],
      },
      //动态参数列表数据
      manyTableData:[],
      //静态参数列表数据
      onlyTableData:[],
      //上传图片的URL地址
      uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的headers请求对象的请求头
      headersObj:{
        Authorization: window.sessionStorage.getItem('token')
      },
      pagePath:'',
      dialogVisible:false,


    }
  },
  created(){
    this.getCateList()
  },
  methods:{
    async getCateList(){
      const {data:res} = await this.$http.get('categories',{params:{}})
      if(res.meta.status !== 200) {
        return this.$message.error('获取错误')
      }
      this.cateList = res.data
    },
    //级联选择器选中变化会触发
    handleChange(){
      if(this.addForm.goods_cat.length !== 3){
        // return null
        this.addForm.goods_cat = []
      }

          console.log(this.addForm.goods_cat);

    },
    beforeTabLeave(activeName, oldActiveName){
      // console.log('即将离开的是' + oldActiveName);
      // console.log('即将进入的是' + activeName);
      // return false
      if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
          this.$message.error('请先选则商品分类')
        return false
      }
    },
   async tabClicked(){
      // console.log(this.activeIndex);
      //证明访问的是动态参数面板. 且可以将选中的三级分类id搞成计算属性，就简便了
      if (this.activeIndex === '1'){
        // this.$http.get(`categories/${this.addForm.goods_cat[2]}/attributes`)
         const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel: 'many' }})
        if (res.meta.status !== 200){
          return this.$message.error('获取错误')
        }
        console.log(res.data);
        res.data.forEach(item =>  {
          item.attr_vals    =   item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      }else if (this.activeIndex === '2'){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel: 'only' }})
        if (res.meta.status !== 200){
         return  this.$message.error('获取错误')
        }
        this.onlyTableData = res.data
      }
    },
    //处理图片预览效果
    handlePreview(file){
      console.log(file);
      //1 先获取到URL地址,保存到data中
      this.pagePath = file.response.data.url
      //
      this.dialogVisible = true
    },
    //点击叉号,移除图片的操作
    handleRemove(file){
      console.log(file);
      //1,获取将要删除的图片的临时路径
          const  filePath = file.response.data.tmp_path
      //2, 从pics数组中,找到这个图片对应的索引值.findIndex函数里,接收一个回调函数,形参x就是数组里的每一项. 如果x的路径(pic) 和filePath一样,就返回索引
        const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      //3,调用数组的splice方法,把图片信息对象,从pics数组中移除
      this.addForm.pics.splice(i,1)
    },
    //监听图片上传成功的事件
    handleSuccess(response){
      console.log(response);
      //1,拼接得到一个图片信息对象
        const picInfo = { pic : response.data.tmp_path}

      //2,将图片信息对象,push到pics
      this.addForm.pics.push(picInfo)
      console.log(this.addForm);
    },
    add(){
      this.$refs.addFormRef.validate( async valid =>{
        if(!valid){
          return this.$message.error('请填写必要的表单项目')
        }
        //执行添加的业务逻辑
        //     this.addForm.goods_cat = this.addForm.goods_cat.join(',')
        //lodash  cloneDeep(obj)

          const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        //处理动态参数，循环manyTableData数组， 进行处理，再push到addForm的attrs里
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value:item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value:item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form);

        //发起添加商品的请求，要提交一个表单，就是上门的form
        //商品的名称，必须是唯一的
       const {data: res} = await this.$http.post('goods' , form)
        console.log(res);
        if(res.meta.status !== 201){
          return  this.$message.error('添加商品失败')
        }

        this.$message.success('成功')
        this.$router.push('/goods')
      })
    },
  },
  computed:{
    //当前选中的三级ID
    cateId(){
      if (this.addForm.goods_cat.length === 3){
        return this.addForm.goods_cat[2]
      }
      return  null
    }
  }
}
</script>

<style scoped>
.el-steps{
  margin: 20px;
}
.el-step__title{
  font-size: 50px;
}
.el-checkbox{
  margin: 0 10px 0 0 !important;
}
.pageImg{
  width: 100%;
}
.btnadd{
  margin-top: 15px;
}
</style>
